Reconstruction Design Methodology

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1、Chapter4ReconstructionDesignMethodologyThischapterpresentsamethodologyforthesystematicreconstructionofdesignconceptsoflostmachines.Designspecificationsofthetargetsub-jectareaddressed.Variousatlasesofgeneralizedkinematicchainsarein-troducedandprovidedastheinclusivedatabanksforthegenerationoffeasibles

2、pecializedchains.Theconceptofspecializationisfurtherpre-sentedforidentifyingallpossiblereconstructiondesigns.Anexamplere-gardingtheconceptualdesignofplanetarygeartrainsforinfinitelyvarioustransmissions[1,2]isadoptedsimplyforthepurposeofillustratingeachstepofthedesignmethodologyindetail.4.1Introducti

3、onOneofthemostdifficulttasksinresearchoflostancientmachinesistoreconstructtheoriginaldesigns.InpastyearssomereconstructiondesignsoflostmachinesinancientChinawerebroughtintoexistencebasedonliteraturestudies,andwithorwithoutthehelpofmodernscienceandtechnology.However,thesede-signsweremainlybasedonpers

4、onalknowledgeandjudgment.Theproc-essreliedonindividualexperiences,andtheresultsmaynotbesolidlyfunctionalandproven.Sofar,noexistingmethodisavailabletodirectlyguideresearcherstoreinventlostdesigns.Thepurposeofthischapteristopresentastep-by-stepprocedureforthesystematicreconstructionofallpossibletopolo

5、gicalstructuresoflostmachines,subjecttodesignrequire-mentsandconstraints.Thisprocedureutilizestheideaofcreativemecha-nismdesignmethodologytoconvergethedivergentconceptionsobtainedfromliteraturestudiestoafocusedscope.Mechanicalevolutionandthevariationmethodarethenappliedtoobtainfeasiblereconstruction

6、designsthatmeetthescienceandtechnologystandardsofthesubject’stimeperiod.[2–4]Thismethodologydoesnotattempttoreconstructtheoriginaldesignforaspecificlostmachine.Itspurposeistosystematicallygenerateallpossibledesignconcepts,thatis,thetopologicalstructureofmechanisms9596Chapter4ReconstructionDesignMeth

7、odologyofthetargetlostmachine.Ifthedefinedand/orconcludeddesignspecifi-cations,topologicalcharacteristics,anddesignrequirementsandcon-straintsarefeasible,oneoftheresultingreconstructiondesignsshouldbe